get a hold of a hacked bios...make sure you have the correct bios and it is the correct size...rename the bios to bios.bin....create a 100mb dummy file...burn both your bios.bin and your dummy file as an image.
remember to burn it as a data disc not an iso also a good idea is , if oyure using cdrw (most popular choice) burn some music to it first, and see if your xbox can read it, then you know the media works. Dont forget too, most new chips you dont need a bios disc, you can flash bios on the xecuter2.6 from a hdd with a bios on, the x3 and xenium have a OS to make it easier. also if yo udo make a bios disc, just rename it to BIOS not bios.bin as it can be read as bios.bin.bin trust me, Its happened
yeah i suppose i should start making my posts a little easier for the noobs to understand...sometimes i just assume that they know at least a little bit, when really they don't.